* ee/master: (28 commits)
  Add system hooks user_rename and group_rename
  Fix EE-only exception to the git default user SSH config check
  Allow Geo repository sync over HTTP/HTTPS
  Correctly handle a failure to create a new Geo node
  Refactor most EE-specific code out of Gitlab::Git::GitAccess
  More the specs more robust
  Make Geo::PruneEventLogWorker generate some logging
  Use Gitlab::Geo::LogHelpers where possible
  Improve mocking on Geo::NodeStatusService
  Do not generate Geo Log events when there are no secondaries
  Create Geo::PruneEventLogWorker
  Extract try_obtain_lease to a concern
  Update wording
  Spec the committer ChangeAccess check for merge requests
  Add a spec for a fast forward merge
  Validate that the committer email is verified on the user.
  Build messages used on the project settings page
  Rename commit_author to commit_committer
  Validate the commit using all known email addresses for the user
  Address some sections of first code review
  ...